Smoking pipe



W. B. BUSH SMOKING PIPE March 7, 1939.

Filed Deo. 24, 1936 Patented Mar. 7, 1939 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to an improvement in smoking pipes.

I'he object of the invention is to effectively remove the nicotine from the smoke before the same reaches the smokers mouth by the use of a simple and inexpensive attachment, and to cool the smoke to a substantial degree.

In the preferred embodiment of this invention, the removal of nicotine is accomplished by means of troughs, arranged in tandem in the path of the smoke, and each having transversely overlapped fingers arranged in staggered relation and laterally spaced from each other to admit the smoke approximately throughout the length of the trough to catch and hold the nicotine as the smoke passes through these troughs, so as to prevent this nicotine from being carried by the smoke to the users mouth. One of these troughs is attached to the stem, while the other is inserted into the lower portion of the pipe by means of a knob that may be withdrawn to facilitate cleaning of the trough and removal of the nicotine therefrom. This knob is provided with a slot which communicates with the smoke passage so that upon turning the knob the passage may be closed to prevent any nicotine from draining into the stem from the lower portion of the bowl or the lower trough, when the pipe is being carried in the pocket.

The smoke is cooled by being directed through a zigzag passageway, one portion of which is in the nature of a back draft passage leading to the stem, so that there is not a direct draft on the nicotine that forms in the bottom of the pipe, and so that the smoke travels through a passage of substantial length before reaching the stem, thus providing a cool dry and free smoke.

A preferred embodiment of the invention is illustrated in the accompanying drawing in which:

Fig. 1 is a longitudinal sectional View through the pipe;

Fig. 2 is a transverse sectional View therethrough on the line 2-2 of Fig. 1;

Fig. 3 is a disassembled perspective View of the lower trough and its knob;

Fig. 4 is a transverse sectional view therethrough on the line 4-4 of Fig. 3; and

Fig. 5 is a detached perspective view of the back draft tube.

The pipe illustrated is provided with the usual bowl I, having an enlarged projecting portion 2 for attachment of the usual stem 3.

The enlarged portion 2 is preferably elongated in cross section as shown in Fig. 2, and is provided with parallel openings or passageways 4 and 5, of which the passageway 5 has a closed inner end, but receives the end of the stem 3 in its. outer end. The passageway 4 extends directly from the bottom of the bowl I, being restricted at 4', and has its outer end communicating with the inner end of the passageway 5, through a back draft passage 6 having a tube I therein to line the passage B, This tube 1 is provided in order to drain any nicotine which may get into the back draft passage or into the upper passageway 5, back into the lower passageway 4, so as to keep it out of the stem. The passageways 4 and 5 may be cleaned by inserting an ordinary pipe cleaner therein.

The outer end of the passageway 4 is closed by means of a tubular knob 8, the outer end `of which is closed and enlarged to form a head 9 to limit the insertion of the knob 8 and to permit its withdrawal. The tubular knob 8 is provided with a longitudinal slot I0 in position to register with the back draft passage and the lower passageway 4, but upon turning the knob 8, this communication may be cut-off and the back draft passage 6 closed in order to keep any nicotine that may be in the lower passageway from running into the upper passageway when the pipe is being carried in the pocket in an inverted position.

Located in the passageways 4 and 5, are metallic troughs or tubes II and I2, each of which is constructed substantially as shown in Fig. 3, being provided with laterally spaced transversely overlapped fingers I3 arranged in staggered relation in the sides thereof with spaces therebetween for ilow of smoke into the trough approximately throughout its length, and each trough has a substantially cylindricalportion I4 inserted respectively into the tubular knob 8, and the inner end of the stem 3 in order to support these troughs respectively.

Each trough is shown as formed of sheet metal bent approximately into semicylindrical shape throughout the major portion of its length, except the cylindrical portion I4, the fingers being turned in as shown. This provides a substantial space at the top of each passage 4 and 5, so that the smoke accumulating in this space approxmately throughout the length of the trough, except the portion I4, will be drawn into and through the trough to trap the nicotine therefrom. The lower peripheral portion of the trough is spaced from the adjacent portion of the passageway 4 or 5, as shown in Figs. 1 and 2, so as to permit smoke to come into contact with the peripheral surface of the trough throughout substantially its entire length, except the portion I4. The staggered relation of the lingers permits smoke to enter the trough not only from one end thereof, but also permits the smoke which circulates about and in contact with the outer peripheral surface of the trough approximately throughout its length, to find access to the inside of the trough at any point in the length thereof except at the cylindrical portion I4.

As the smoke passes through the troughs II and I2, through the spaces between the fingers I3, the troughs will tend to remove from the smoke any nicotine contained therein, which will be received and held in the troughs until 'the latter are removed and cleaned. The tandem relation of the troughs gives a double check on the nicotine preventing it from reaching the mouth with the smoke.Y The lower trough may be removed by the removal of the knob 8, for Yeffective cleaning thereof and' of the passageway 4, of any accumulation of nicotine, while vthe-upper trough may be removed with the stem for effective cleaning. VLikewise the back, draft tube V'I can be Acleaned with an ordinary pipe cleaner through the outer end of the lower passageway 4 upon :removal of the knob 8. In this way, substantially all of the nicotine is effectively removed from the smoke and prevented from reaching the mouth.

By providing the zigzag passageway for the smoke, `including the back draft passage 6, the smoke passes through a substantial length of stem, approximately two inches-more than would be provided otherwise, and this helps to cool the smoke before it reaches the mouth. This back draft is nota direct pull on the burning tobacco inthe bowl, so `thatit keepslthe pipe cool and dry andthe draft is not 'on the nicotine that forms in the bottom of the pipe, thus smoking lfreely and providinga cool dry smoke.

'I'he tube 1 and troughs II and I2 preferably are constructed of aluminum for lightness in weight and eiliciency in use being a porous metal. However, other suitable light weight metals or other materials may be used, if desired, for one 4or more vof -these metallic elements.

I claim: Y Y

1. In a smoking pipe comprising a bowl hav- -ing a-side'projec'tion thereon for Vconnection with a stem, said projection having a passageway4 therein Vleading from the bowl, a trough mounted in said'passageway, said trough having itsside Walls provided with transversely overlapped iingers at the upper edges thereof and approximately in a plane where said side walls are at their greatest distance apart and spaced from the adjacent portion of the passageway, said fingers being arranged in staggered relation and laterally spaced from each other for the passage of smoke into said trough approximately throughout the major porti-on of the length thereof to trap nico-tine from the smoke.

2. In a smoking pipe comprising a-bowl having a side projection thereon anda stem connected with said projection, said projection having a.

passageway therein leading from the bowl to the stem, a hollow knob inserted into an end `portion of the passageway and constituting part of the passageway for the smoke, said knob hav- 'ing a slot Ythrough which smoke can pass from the knob Yto the stem, and a trough carried by said knob in the passageway and spaced from the sides thereof approximately throughout the length-'of said trough, said troughr having transversely overlapped fingers arranged in staggered relation and laterally spaced from each other for the passage of smoke into said trough'apjproximately vthroughout the length thereof to trap nicotine from the smoke.

3. In a smoking .pipe comprising a bowlhavlng a side projection thereon, said projection having approximately parallel passageways therein with an inclined back-draft passage extending from the outer' end of the lower passageway to the: `in- Y .,passageway-infspaced relation to all :sides thereof approximately throughout the length of said trough, said trough being .approximately U- :shaped in'fcross-section with transversely o'verlapped fingers arrangedin staggered relation and laterally spaced from'fjeach" other for the passage 'of fsmoke intofs'aid'troughapproximately through- 'out thelength thereof to trap nicotine therein from lthe smoke.

WILLIAM B. BUSH. 

